diff-index.c: "git diff" has no need to read blob from the standard input
Only "diff --no-index -" does. Bolting the logic into the low-level
function diff_populate_filespec() was a layering violation from day
one. Move populate_from_stdin() function out of the generic diff.c
to its only user, diff-index.c.
Also make sure "-" from the command line stays a special token "read
from the standard input", even if we later decide to sanitize the
result from prefix_filename() function in a few obvious ways,
e.g. removing unnecessary "./" prefix, duplicated slashes "//" in
the middle, etc.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/diffcore.h b/diffcore.h
index b8f1fde..ae43149 100644
--- a/diffcore.h
+++ b/diffcore.h
@@ -43,6 +43,7 @@
unsigned should_free : 1; /* data should be free()'ed */
unsigned should_munmap : 1; /* data should be munmap()'ed */
unsigned dirty_submodule : 2; /* For submodules: its work tree is dirty */
+ unsigned is_stdin : 1;
#define DIRTY_SUBMODULE_UNTRACKED 1
#define DIRTY_SUBMODULE_MODIFIED 2
